Import Tuner Challenge is set on the Shuto Expressways of Tokyo, Japan. There a total of 415 rivals in the game. It features C1 and Shinkanjo like many other TXR games but unlike TXR3, Import Tuner Challenge does not feature the highways of Nagoya, Osaka, and Yokohama. But two new highway sections of Tokyo are in the game which are Rt.3 Shibuya and Rt.4 Shinjuku.